My MMR is broken.

I'm trying to climb to master within last couple days, but each win only grain me +13Lp is absolutely disgusting. My opgg: https://na.op.gg/summoner/userName=BiIiBili If you just check ranked only, I had mostly wins. I don't need +18,+20. At least a +15LP? Maybe? https://imgur.com/KsXWRhD I win two game right after promotion to d2 and the total point I have right now is 26. Before promotion, it was also +13 and -18 if lost.